423771 has 4 divisors (see below), whose sum is σ = 565032. Its totient is φ = 282512.

The previous prime is 423769. The next prime is 423779. The reversal of 423771 is 177324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423771 - 2¹ = 423769 is a prime.

It is a D-number.

423771 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (423779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70626 + ... + 70631.

It is an arithmetic number, because the mean of its divisors is an integer number (141258).

2⁴²³⁷⁷¹ is an apocalyptic number.

423771 is a deficient number, since it is larger than the sum of its proper divisors (141261).

423771 is a wasteful number, since it uses less digits than its factorization.

423771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141260.

The product of its digits is 1176, while the sum is 24.

The square root of 423771 is about 650.9769581176. The cubic root of 423771 is about 75.1121876576.

The spelling of 423771 in words is "four hundred twenty-three thousand, seven hundred seventy-one", and thus it is an iban number.